How to fix leaky gutters

Seal leaky gutter joints and small holes using gutter sealant applied from the inside the gutter. A tube of sealant costs about $5.

Repair larger holes using a gutter patch kit or a scrap of metal flashing glued down with sealant. You’ll find patch kits at home improvement centers for about $10.

How to straighten sagging gutters

If you suspect a sag, get up on a ladder and sight down the length of the gutter. Gutters should be straight. Long gutters should have a peak in the middle to enable water to run toward downspouts at either end.

The problem area should be easy to spot. In most cases, you can simply reposition loose hangers, using a cordless drill or a hammer.

Here’s how to set stubborn sags straight:

  • From the ground, prop a long, straight 1x4 or 2x4 brace under the sag.
  • Get up on a ladder and remove a hanger or two near the sag.
  • Sighting along the gutter, adjust the brace until the sag disappears.
  • Replace the hangers. If needed, add one or two new hangers for extra support. They cost less than $3 each.